16511222016 has 81 divisors (see below), whose sum is σ = 47623713501. Its totient is φ = 5501684736.

The previous prime is 16511222003. The next prime is 16511222107. The reversal of 16511222016 is 61022211561.

The square root of 16511222016 is 128496.

It is a perfect power (a square), and thus also a powerful number.

16511222016 is a `hidden beast` number, since 1 + 651 + 1 + 2 + 2 + 2 + 0 + 1 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 306950400 + 16204271616 = 17520^2 + 127296^2 .

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 6166470 + ... + 6169146.

Almost surely, 2^16511222016 is an apocalyptic number.

16511222016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

16511222016 is the 128496-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16511222016

16511222016 is an abundant number, since it is smaller than the sum of its proper divisors (31112491485).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16511222016 is an frugal number, since it uses more digits than its factorization.

16511222016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5376 (or 2682 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

Adding to 16511222016 its reverse (61022211561), we get a palindrome (77533433577).

The spelling of 16511222016 in words is "sixteen billion, five hundred eleven million, two hundred twenty-two thousand, sixteen".